I dont see how Bristol has any relevance. The question was have the restrictions worked.
Did closing nightclubs , stopping crowds at stadiums , the rule of 6 in pubs work.
Im 99.9 per cent sure if those things hadnt been restricted there would have been more close contacts more infections more people isolating.
I have no idea on why Bristol is currently less.
Im pretty certain its not because they can go to the football , go to packed nightclubs and pubs though.